Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The sum of the series 3 + 8+16 + 27 + 41.......upto 20 terms is equal to
Text Solution
Verified by ExpertsThe correct answer is:
B
4430
S n = 3 + 8 + 16 + 27+........ +t n
S n =3 + 8 + 16+ ........ +t n-1 + t n
Subtracting, we get,
0-3 + 5 + 8 + 11 +........+ (t n - t n-l ) - t n
t n = l + (2 + 5 + 8 + 11+ ......... n terms)
= 1 + 
(4 + (n-l)3) = l + 
(3n + l)
S n = 
t n = 
l + 
n 2 + 
n
for 
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